Components

The Automatic Climate Control (ACC) system consists of the following components:
1 There is a cabin temperature sensor fined in the facia. This continuously sends information to the ACC control module concerning cab temperature, which is the most important reading for the ACC system. Correct positioning is important for good operation.
2 A blended air temperature sensor is installed in the defroster outlet on the heating and ventilation unit. This measures the temperature of the air that is blown out of the heating and ventilation unit.
3 There is a solar sensor located on the top of the facia. This provides the ACC control module with information about solar intensity on older models and even height and angle in relation to the car on later models. Location may vary between year models.
4 The ACC control module compares all measured values from the above components with the selected temperature on the display. The components to adjust and maintain the desired temperature in the cabin:
5 There is a stepping motor which sets the air mixing damper in order to achieve the correct blended-air temperature.
6 A stepping motor adjusts the air distributor so that the required air distribution is achieved.
7 A DC motor sets the recirculation damper to either fresh air or recirculated air position.
8 A variable speed DC motor drives the ventilation fan. Fan speed can be manually or automatically controlled.
9 A fan control unit regulates the speed of the ventilation fan motor.
10 The rear door fans prevent misting on the rear door windows. The speed of these is controlled by the ACC control module.